Update README.md (#961)

Author: geoknee

validation/README.md

@@ -1,4 +1,3 @@
 # validation
 
-This directory contains the golang validation checks that chains run against.
-The [validation_test.go](validation/validation_test.go) file is the entry point of the tests. It runs a different set of tests for each class of chain (Frontier, Standard Candidate and Standard).
+This directory contains TOML files declaring standard configuration and contract versions, and Go bindings for these declarations.